Simulation analysis and multi-objective optimization design of wheel based 90° impact test

Based on the finite element simulation models of the 16-inch assembled wheel for 90° impact tests, a multi-objective lightweight design method was proposed. In this method the material properties, structure parameters and 90° impact performance of the wheel were considered. The plastic strain and deformation of the spoke and rim of the wheel during hammer impact facing the window and hammer impact facing the valve window were obtained, which meet the wheel impact test standard and can be optimized furthermore. Mesh morphing technology was employed to build the parametric models of the assembled wheel, which was used to define the design variables, and the mass and 90° impact performance were defined as the objective functions. Then, the Optimal Latin Hypercube design and Hammersley design were used to fit the Kriging surrogate model of the target response value and to validate the precision of the surrogate model in Isight software platform, where the DEP-MeshWorks and LS-DYNA software were integrated. Finally, Non-dominate Sort Genetic Algorithm (NSGA-II) was adopted to perform the multi-objective optimization of the wheel. The weight of the optimized assembled wheel was 28.28% less than that of the same type cast aluminum alloy wheel. According to 90° impact test standard for wheel, the test for the optimized wheels were conducted to validate the high-accuracy simulation results by comparing the simulation and test values of equivalent strain and maximum acceleration on the measuring points. © 2019, Editorial Board of Jilin University. All right reserved.